Resourceadm: refactor route parameters in resource admin

[mgunnerud]

Description

Change route parameter names in resource admin after change in Studio (as resource admin use some of the same components which expects special names for route parameters): selectedContext -> org repo -> app

Related Issue(s)

• this PR

Verification

• [x] Your code builds clean without any errors or warnings
• [x] Manual testing done (required)
• [x] Relevant automated test added (if you find this hard, leave it and we'll help out)

Documentation

• [ ] User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.73%. Comparing base (28f0243) to head (819503b).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #13066 +/- ## ======================================= Coverage 91.73% 91.73% ======================================= Files 1424 1424 Lines 19985 19985 Branches 2395 2395 ======================================= Hits 18333 18333 Misses 1392 1392 Partials 260 260 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.